There is an increased urge to facilitate a transformation of the Dutch food to address pressing sustainability challenges. At present, these calls for transformation are most often met with calls for new technologies, practices and innovation, supported by claims that they will eventually outcompete unsustainable ones. This “innovation bias” in transition’s research and practice emphasises novelty, while it often obscures the need to also let go of specific unsustainable technologies, practices and ways of thinking about our food system. Given that the Dutch food system remains unsustainable despite innovation efforts, this thesis draws attention to research and practice describing how to address unsustainability directly. Specifically, I introduce and develop the concept of “unlearning” that involves distancing or discarding of skills and practices; norms, values and beliefs; and mindsets and worldviews that perpetuate unsustainability. Empirically, I study how processes of unlearning unfold within “unlearning spaces” in which individuals are confronted with the limits of their habitual behaviours and beliefs. The unlearning spaces that are studied in this thesis are community-supported agriculture (CSA) initatives in which consumers and farmers collaborate as around local food. Such initiatives enable rethinking our food system, for example: how food is produced, by whom, and who carries responsibility for a sustainable food system transformation. Additionally, this thesis explores how unlearning may be facilitated in agricultural programmes at secondary vocational educational (Dutch: MBO), specifying a key role for teachers as “unlearning facilitators”. Facilitators can inspire and support individuals who are unaware or reluctant to unlearn. Combining my literature review and empirical findings, this thesis develops nine propositions on unlearning for sustainability transition studies: unlearning (i) involves the distancing and discarding of skills and practices; norms, values, and beliefs; and mindsets and ...